Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b01969f588840c4…

MALICIOUS

PDF

45.3 KB Created: 2020-09-30 02:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5ce2ba471c21496df3be56b286a09c28 SHA-1: daf1bf71bbd6d71f77abb820ddaf74ada3c552f4 SHA-256: 5b01969f588840c4366d204f2c75750f0219b699e19a3286d925af827e2be6f6
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=download+blob+as+pdf+javascript In PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/zamofugobovotitetet.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/27238803975.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/82377261718.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/risebosuvavuwor.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/nezelugixaxeki.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/tenulobokevazad.pdfIn PDF document text
    • https://site-1036858.mozfiles.com/files/1036858/83850592414.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/kesavaketuzuvuxiwora.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/2270782636.pdfIn PDF document text
    • http://files.tinaraylifeupsidedown.com/uploads/1/3/1/4/131438071/6358689.pdfIn PDF document text
    • http://subutowu.kashmirhouseboatsonline.com/uploads/1/3/1/0/131071164/tazaxozezifu.pdfIn PDF document text
    • http://geralelem.kimstravelers.com/uploads/1/3/0/8/130814328/2930296.pdfIn PDF document text
    • http://files.judhampson.com/uploads/1/3/0/7/130740496/jebatab.pdfIn PDF document text
    • http://files.freehillblades.com/uploads/1/3/1/3/131380889/fanujepusi-wawud.pdfIn PDF document text
    • http://zosowej.christopherbskinner.com/uploads/1/3/0/7/130739140/8404263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 5516 bytes
SHA-256: e12db08ade137b56cd9e49d7c3bc0298028658f7869d09ed4097be873f3a5a8f
font_01_sfnt_off000085b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B1 10088 bytes
SHA-256: 7eeeb1dbbaa27052c1cafebc384c295ef12a53115597a5b1571cff857e91b4ec

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